diff --git a/patch_cursor_get_machine_id.py b/patch_cursor_get_machine_id.py
index 540fcf09..e65e52d7 100644
--- a/patch_cursor_get_machine_id.py
+++ b/patch_cursor_get_machine_id.py
@@ -215,8 +215,12 @@ def backup_files(pkg_path: str, main_path: str) -> bool:
     """
     try:
         # 只备份 main.js
+        backup_main = f"{main_path}.bak"
+        if os.path.exists(backup_main):
+            logger.info(f"备份文件已存在，跳过备份步骤: {backup_main}")
+            return True
+            
         if os.path.exists(main_path):
-            backup_main = f"{main_path}.bak"
             shutil.copy2(main_path, backup_main)
             logger.info(f"已备份 main.js: {backup_main}")
 
diff --git a/reset_machine.py b/reset_machine.py
index 601dc47f..ce06788a 100644
--- a/reset_machine.py
+++ b/reset_machine.py
@@ -103,12 +103,15 @@ def reset_machine_ids(self):
             with open(self.db_path, "r", encoding="utf-8") as f:
                 config = json.load(f)
 
-            # 创建备份
+            # 只在备份文件不存在时创建备份
             backup_path = f"{self.db_path}.backup"
-            print(f"{Fore.CYAN}{EMOJI['BACKUP']} 创建配置文件备份...{Style.RESET_ALL}")
-            with open(backup_path, "w", encoding="utf-8") as f:
-                json.dump(config, f, indent=4)
-            print(f"{Fore.GREEN}{EMOJI['SUCCESS']} 备份文件已保存至: {backup_path}{Style.RESET_ALL}")
+            if not os.path.exists(backup_path):
+                print(f"{Fore.CYAN}{EMOJI['BACKUP']} 创建配置文件备份...{Style.RESET_ALL}")
+                with open(backup_path, "w", encoding="utf-8") as f:
+                    json.dump(config, f, indent=4)
+                print(f"{Fore.GREEN}{EMOJI['SUCCESS']} 备份文件已保存至: {backup_path}{Style.RESET_ALL}")
+            else:
+                print(f"{Fore.CYAN}{EMOJI['INFO']} 已存在备份文件，跳过备份步骤{Style.RESET_ALL}")
 
             # 生成新的ID
             print(f"{Fore.CYAN}{EMOJI['RESET']} 生成新的机器标识...{Style.RESET_ALL}")